Amazon offers Prime members the
K&H Thermo-Kitty 16" Heated Cat Bed in Sage, model no. 3193, for
$19.49 with
free shipping. (Non-members can spend $49 or more to qualify for
free shipping; otherwise, shipping adds $7.91.) That's $2 under last month's mention the lowest total price we've seen. (It's the best now by $5.) It's recommended for indoor use and features soft foam walls and a 4-watt dual-thermostat heating unit.