Need Info on L-88s

[Bad67300]

Hi, I have an opportunity to buy two 427s and need some info. I've done searching through the site but still have more questions.

First 427 is definitely an L-88. Long block hasn't been apart. The pan was changed and confirmed to be 4 bolt mains. Block casting number is 3963512, heads are aluminum snowflake casting numbers 919842, and there is a block stamping on the pad in front of the head. The bottom 1/3 of the letters/numbers are illegible, but I believe it reads CE071714. The 7's sit a little lower than the 1s and the 4. The current owner indicated it came out of a 68 or 69 Camaro and that it was running when pulled. Currently no intake. Unfortunately I didn't get a picture of the date stamps on block or heads. I understand CE is crate engine, but any thoughts on the numbers after that? He asked me to make an offer on this one. I don't know what a fair price is for it.

Second 427 is a 4 bolt block and steel crank only. I wasn't able to get to it to look at casting numbers, but both have been machined, oiled, wrapped, and ready to assemble. He's asking $1100 for this one.

Any thoughts or information on the market for these would be great. Thanks!