Help need your opinion or just two cents

[Eyegore]

We found a 74 k-10 4x4, gmc, it is pretty much stock, 33" tires, original paint and so on. Here's the problem, the front and rear seals are leaking, 1" diameter drops after 10 minitues of setting. The trans also feels like it takes long time to get it going in reverse, slips so I know a rebuild is around the corner. What would you expect to pay? $1100 straight body no if minimal rust. And what can i expect to pay to have the seals done?

Thanks ahead of time

Tom

Sorry no pics my camera fried on me.