Questions about replacing my almost blown 3650
My 3rd gear synchro has been blown for the past year and yesterday, even with rev-matching to slip it into third, it's popping out of gear. At the same time, it's become a chore to even put it in gear in any gear. 2nd is clunky, 4th grinded a couple times, and the shifter barely feels like its in neutral because when moving the shifter right and left I can feel the gates. When pushing the clutch in, the shifter moves and vice versa.
I realize it's most likely beyond repair, so I've been trying to figure out what route to take in getting a new transmission. From meineke, they said they could find a re-manned unit for between 12-1800 bucks. On ebay there are the same things for 800-1200. A used one from prestige mustang in Georgia is 700. The guy Todd at prestige says they have a 90 day warranty. He says that if there's any slight problem they dot sell it as a transmission but as a core.
Bottom line to where I'm trying to take this is should I trust a 700 dollar transmission from prestige mustang off eBay or go the safer route with a re manufactured unit for the 1200-1800 dollars? Or the remanned 800-1200?
What is the best route and does anyone have any pointers or advice?
2002 Mustang GT 5 speed SOLD
2013 Mustang GT 6 speed: GT Track Package, 301A Tech Package