What should I do... well I know what to do but have no money to do it???

The gearbox is pissing oil out of it and needs seals put in plus it jumps out of third on its own and bites when trying to get into 2nd when 4wding..

My original gearbox needs even more work for it to be viable.. Now Matty has offered me another gearbox but knows not of its history????

I dont have the money at the moment to pull down a gearbox and rebuild it but the effort it takes to take out and put back in I dont want to do it for the 4th time....

Do I take my chances on Matts gearbox?? fruit fudge sticks !!!!!!!!!