What to offer - bad foundation

[Shane Woods]

I found a house on CL and contacted the seller, he's a lanlord/wholesaler. This house is a rental of his that he's getting rid of for whatever reason.

Listed on CL for 44.
After brief txting/emailing, not looking at it yet, he came down to 34k.
After looking at house and same block tax rolls, BUT NO REAL COMPS YET, looks prob 70 ish ARV.
Interior floors are unbelievably uneven, cracks everywhere, etc. It's pier and beam. About 1200 sq ft. My rough estimate for rehab for resale (minus foundation I know nothing about) is at least 23K.

Tell me what else you need to know...I have more info...

I can't imagine paying over 20k for this house, maybe less if resale is the goal. Mostly older small houses on block, 2/3 oo's all being fixed slowly by owners. 1/3 rentals, real rough looking.

Thanks!!!