I need a new place to buy electronic components and some mildly niche circuits/products that's not Amazon. I'm currently looking for an adjustable temp fan controller for an indoor green house. It's sitting in front of a Window on a shelf covered in plastic. I want to add a 12v dc fan to the top to turn on when gets somewhere around 90 degrees farenheit.
I used to use parts-express.com, but it looks like they mostly just do audio now. Does anyone have any good recommendations for purchasing things like this in the USA.

I'm in the market for an OEM part that usually comes with the "premium" trim of my vehicle. Rather than pay the $2000+ listed on the official parts website, eBay gave me several junkyard/recycler types that list the part for $200-$400. Each of these listing make promises about 60-day returns, warranty, etc.

However, I attempted a buy-it-now (with a CC, not through PayPal), and the sale was cancelled within an hour claiming that the part didn't pass their QA. I made the purchase at 9pm, and I wouldn't expect that quick of a turn. I did send a note thanking the account for not sending something that didn't meet their standards.

Then, it happened again almost exactly the same way, save for a 3pm purchase time and a 45-minute refund turnaround. This is raising a bunch of red flags for me. Am I just having bad luck, being paranoid, or is someone trying to maybe steal credit card info?

I'm thinking that calling local junkyards and just asking if they have the year/model of vehicle I'm looking for and potentially the part. Will take any advice, though.