Cheapest by length
| Length | Amazon, per roll | eBay, per roll |
|---|---|---|
| 20 ft | $11.99 | — |
| 25 ft | $12.99 | — |
| 50 ft | $17.99 | $14.99 |
| 100 ft | $28.50 | $22.99 |
| 200 ft | — | $78.70 |
| 250 ft | $59.99 | $50.99 |
| 500 ft | $60.69 | — |
Length is rounded to the nearest standard size. Per-roll price = listing price ÷ rolls in the pack (eBay includes shipping).
All 38 listings, cheapest per ft first
| Item | Size | Price | Per ft | ||
|---|---|---|---|---|---|
| Syston 18/2 Solid Thermostat Cable CMR/CL3R Brown 500 Feet Spool 500 ft | 500 ft | $60.69 | $0.12 | Amazon → | |
| Best 18/2 Thermostat Wire HVAC Bare Copper Cable CMR/Riser-Rated Power Circuit 500ft 500 ft | 500 ft | $82.10 | $0.16 | Amazon → | |
 | 18/2 Thermostat Doorbell HAVC Wire, 7032 CL3R 250' 250 ft | 250 ft | $50.99 | $0.20 | eBay → |
| Voltic Stone 18/2 Thermostat Doorbell HVAC Wire, True Gauge 18 AWG 2 Conductor Solid Copper Control Cable, ETL Listed C… 500 ft | 500 ft | $110 | $0.22 | Amazon → | |
 | 18/2 Syston Thermostat Doorbell HAVC Wire, 7032 CL3R 100' 100 ft | 100 ft | $22.99 | $0.23 | eBay → |
| Thermostat Wire - 18/2 250FT Solid Copper 18AWG 2 Conductor Power Circuit Cable for Heating & air Conditioning Equipmen… 250 ft | 250 ft | $59.99 | $0.24 | Amazon → | |
 | 100 Ft. 18/2 Brown Solid Copper CL2R Thermostat Wire Free Shipping 100 ft | 100 ft | $24.98 | $0.25 | eBay → |
 | 100 Ft. 18/2 Brown Solid Copper CL2R Thermostat Wire Free Shipping New 100 ft | 100 ft | $25.30 | $0.25 | eBay → |
 | 18 AWG -18/2- CL2R 110ft Thermostat Wire ,Solid Copper Brown 2 Conductor 110 ft | 110 ft | $29.29 | $0.27 | eBay → |
 | Southwire 100 ft. 18/2 Solid Copper CL2 Thermostat wire Outdoor/Indoor 150 Volts 100 ft | 100 ft | $26.94 | $0.27 | eBay → |
 | CERROWIRE 18-2 Thermostat Wire 100 ft Feet Spool 210-1002BR NEW 100 ft | 100 ft | $27.34 | $0.27 | eBay → |
| 18/2 Thermostat Wire 18 AWG 2-Conductor Solid Copper Cable, 100 FEET 100 ft | 100 ft | $28.50 | $0.28 | Amazon → | |
| Cableague Thermostat Wire 18/2 18 Gauge 2 Conductor ETL 18-2 100 Feet Brown (18-2 Brown, 100Feet) 100 ft | 100 ft | $28.99 | $0.29 | Amazon → | |
 | Syston 18/2 Thermostat Doorbell HVAC Heating Cable Wire 100 Ft 100% Copper CL3R 100 ft | 100 ft | $28.99 | $0.29 | eBay → |
 | Southwire 2 Conductor 18/2 Thermostat Wire; 18-Gauge Solid Copper - 50ft 50 ft | 50 ft | $14.99 | $0.30 | eBay → |
| Thermostat Wire - 18/2 100FT Solid Copper 18AWG 2 Conductor Power Circuit Cable for Heating & air Conditioning Equipmen… 100 ft | 100 ft | $29.99 | $0.30 | Amazon → | |
| Thermostat Wire - 18/2 100FT Solid Copper 18AWG 2 Conductor Power Circuit Cable for Heating & air Conditioning Equipmen… 100 ft | 100 ft | $29.99 | $0.30 | Amazon → | |
 | 50ft 18/2 Bell Wire Low Voltage Thermostat Doorbell Landscape Lighting Cable 50 ft | 50 ft | $15.16 | $0.30 | eBay → |
 | 18/2 Syton Thermostat Doorbell HVAC Wire, 7032 CL3R 50' 50 ft | 50 ft | $15.99 | $0.32 | eBay → |
 | CERROWIRE 18-2 Thermostat Wire 100ft Spool 210-1002BR NEW 100 ft | 100 ft | $33.00 | $0.33 | eBay → |
 | Southwire 50-ft 18/2 Thermostat Wire Solid Copper Outdoor/Indoor 150 Volts Black 50 ft | 50 ft | $16.95 | $0.34 | eBay → |
 | Thermostat Wire - 18/2 250FT Solid Copper 18AWG 2 Conductor Power Circuit 250 ft | 250 ft | $85.49 | $0.34 | eBay → |
 | Southwire 18/2 Thermostat Wire 100ft SIMpull Tstat® 150V HVAC Cable – Made in US 100 ft | 100 ft | $34.58 | $0.35 | eBay → |
| Cableague Thermostat Wire 18/2 18 Gauge 2 Conductor ETL 18-2 50 Feet Brown (18-2 Brown, 50Feet) 50 ft | 50 ft | $17.99 | $0.36 | Amazon → | |
 | CCI Thermostat Wire 18/2 Solid CL2 In-Wall Cable 50 FT Spool 55302 USA 50 ft | 50 ft | $18.64 | $0.37 | eBay → |
 | 100'- 18/2 Wire-100 feet -Thermostat-Audio-Video-Control-Sound-White -Copper 100 ft | 100 ft | $38.94 | $0.39 | eBay → |
 | 18/2 Thermostat Wire 200 FT - Insulated Solid Copper Wiring for HVAC, Furnace... 200 ft | 200 ft | $78.70 | $0.39 | eBay → |
| White 18/2 Wire-100 feet -Thermostat-Audio-Video-Control-Sound 100 ft | 100 ft | $39.95 | $0.40 | eBay → |
 | THE CIMPLE CO 18/2 Thermostat Wire 200 FT Insulated Solid Copper Wiring 200 ft | 200 ft | $80.04 | $0.40 | eBay → |
 | 18/2 Southwire SIMpull Thermostat / Doorbell / HVAC Wire, 50' 50 ft | 50 ft | $21.65 | $0.43 | eBay → |
 | 18/2 Thermostat Wire 100 FT - Insulated Solid Copper Wiring for HVAC, Furnace... 100 ft | 100 ft | $45.09 | $0.45 | eBay → |
 | 18/2 Thermostat Wire 100 FT - Insulated Solid Copper Wiring for HVAC, Furnace... 100 ft | 100 ft | $45.22 | $0.45 | eBay → |
 | 100 ft 18/2 Thermostat wire 100 ft | 100 ft | $48.02 | $0.48 | eBay → |
| 50'- 18/2 Wire-50 feet -Thermostat-Audio-Video-Control-Sound-White - 50 ft | 50 ft | $24.99 | $0.50 | eBay → |
| 18/2 Thermostat Wire 25FT,18 Gauge 2 Conductor Power Circuit Cable 18-2 Solid Copper Wire for Doorbell HVAC Heating Con… 25 ft | 25 ft | $12.99 | $0.52 | Amazon → | |
| Cableague Thermostat Wire 18/2 18 Gauge 2 Conductor ETL 18-2 25 Feet Brown (18-2 Brown, 25Feet) 25 ft | 25 ft | $13.99 | $0.56 | Amazon → | |
| Thermostat Wire - 18/2 20FT Solid Copper 18AWG 2 Conductor Power Circuit Cable for Heating & air Conditioning Equipment… 20 ft | 20 ft | $11.99 | $0.60 | Amazon → | |
| Thermostat Wire - 18/2 20FT Solid Copper 18AWG 2 Conductor Power Circuit Cable for Heating & air Conditioning Equipment… 20 ft | 20 ft | $11.99 | $0.60 | Amazon → |
Amazon per ft, by day
typical cheapest, per ft
eBay per ft, by day
typical cheapest, per ft
Amazon as of 2026-11-05 17:52:35 UTC: Amazon's own price, else its lowest new offer, before shipping and tax (via Keepa); product prices and availability are accurate as of the date/time indicated and are subject to change. eBay: new Buy It Now listings from US sellers as of 2026-11-05 UTC, item plus shipping.
Size comes from the seller's unit count or the listing title; check the listing before buying. As an Amazon Associate and eBay Partner, Sharpest earns from qualifying purchases.
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