I've been amazed that the popularity of these scented wax warmers (who shall remain nameless).
The warmers are price in the $30 range for the "brand name" ones, refill scents are $5 each (for scented wax! It blows my mind!)
I was at Walmart today and saw that they sell warmers for $15 and refills for $2. I know lots of people use the Walmart brand refills because they are so much less.
I would like a warmer, but I still have one of these old school candle warmers:
And the DIY Total Cost Tally is $2.25:
Warmer- Free (I already had one. I would estimate they run $5 if you can still find them. I see them at the thrift store often)