Not interested in airsoft / china junk (no leapers, UTG, etc.). I can buy a new Troy for a little over $100, but I’m looking for something in used condition for less money. Nothing fancy, simple drop in old school M4 rail.
Try Thoroughbred Armament. They often have military surplus AR parts for sale that actually were used in the sandbox. I have bought plenty from them. They have been solid. Best of luck…
I recently grabbed a B&T 4X NAR for Colt M4 w/PEQ 2 Interface from B&T cheap. I think it was $125, a little more pricey than you want but a decent carbine rail. May want too check that out. Or I may be way off to what you are looking for to buy. Wow, I just checked and they went up to $226, disregard.
Wet Worx is a bit pricey for what they sell, but at least they have stuff in stock. Definitely can’t say the same for most places these days. Crazy to think M4 RAS rails have reached collector status.