we buy sites.
we value seo differently.
GOOD seo reduces our cost of paid traffic.
we find a site with seo only traffic, not that interested. unless we can see a clear path to paid.
Paid is sustainable, even tho the adds get over done, you can redo them in a week and have fresh traffic, SEO, takes 6 moths to really see if its working.
so for us, a good mix of both has to be done to get the best valuation.