I'm not sure if you're ONLY looking to get a good deal on something used, but I have this kit from DNA Motoring and it sounds great. No drone, a lot louder than stock but nothing ridiculous. Definitely worth the price tag, basically a Replica HKS kit. The welds are clean-ish, bends are smooth, I wished it was a bit larger diameter piping but my butt-dyno tells me it performs better than stock. A little bit of fitment issues but nothing that couldn't be fixed after bending hangers. $400 bucks well spent IMO.
Last Edit: This is a review from a user on here for the same kit but bought from eBay:
Honest Cheap eBay Exhaust Review
https://www.amazon.com/DNA-Motoring-.../dp/B00TY3ALLW