When you deal with a vendor that is not well know, order and pay with a credit card, so you can have the credit card company charge them back if there are any problems.
I looked at their web site and I didn't see any obvious red flags, like they are located in a forign country or only accepted PayPal.
Lastly, what parts are you looking for? Many times you can replace them with off the shelf standard parts at a lower cost.