Harbor Freight Tools offers the Drill Master 1,500-watt Dual Temperature Heat Gun for $9.99 plus $6.99 for shipping. That's the lowest total price we could find by $2. It features two heat settings (572°F and 1,112°F) and a temperature lock.
Frugal isn't smart if you put off replacing these things. Waiting too long can cost money or even endanger your health.