Bad news from the machine shop today

[82 GT]

I went to drop my block and crank off today at the machine shop and the guy felt inside the bores and said it will need to be bored.
I didn't really plan on buying new pistons.
I guess there were ridges and he said he would probably have to take it top .060 to get a good job(it's already .030 over).
I didn't take the main caps with me but he said he would like to have them so he can check the align bore. He said if the align bore is out then it probably won't be worth spending the cash to fix it since it would be already bored to the max and wouldn't be able to be rebuilt again in the future.

I did, however, find a guy selling another 351 block that has already been hot tanked and bored .040 with a good crank and .040 pistons for $200
I think it might be cheaper to just by this block that's already to go than to spend $250 on mine and that's if the crank doesn't need turned which will be another $65
Then I get to thinking, "what if this block for sale is actually junk and I waste good money on it?"
What should I do?