Selling my Amazon Affiliate portfolio. Contracts??

So I'm selling my Amazon affiliate site portfolio.

Most of them are gone but I had one of my smaller sites get purchased for $1,200.

Buyer wants me to sign an overly complicated asset purchase agreement.

I don't feel comfortable signing this without my attorney reading it but he would charge me half the price of the site to look it over.

What's crazy is I sold another side for over $14k and no contract was even mentioned. He just verified traffic and income.

I sold it on flippa and the paypal payment was already sent.

Can I tell them no?

If this isn't a Flippa requirement you can say no.
To be sure, why don't you ask Flippa support about this?

Ask them if they can send you a shorter contract (1 or 2 pages) to do things easier.