I use a wine cooler. The better ones cost more but you can get some in your price range and they do usually have a warranty. Keep your receipt and documentation! I had one go out in 8 months with a 1 year warrenty. It was replaced and have had no problems with the second unit. I keep the temperature in the 52-54°f range.
Many basenoters wil poo-poo the need. I ignore them and suggest that if you want the insurance of a wine cooler that the investment is worth it. Those that don't want the insurance of keeping their fragrances at a consistant low temperature should just not buy a cooler.
Check in local "big box" stores and watch for sales.