I bought a site earlier this year for $10k, it's been a solid earner since the purchase date and with some tweaks (aka more / better ad placements etc) the site should be paid off before the end of this month which is awesome (wish they all went this way).
This time around I tried something different with this purchase. Specifically, the seller was really knowledgeable about this niche and so one of the things I tried to do was get the owner to write a more detailed how to info product to try selling to the email list and to wrap this into the purchase price of the website. I had the completion of this guide within our contract, but after the sale there were some issues (will leave it at that) and the owner has still yet to deliver this to me.
I don't want to bother with the legal hassle of going after the seller for not completing this part of our deal - but it has made me decide that I'm not going to do any other types of deals like this again. Beyond a typical XX hours of help that I typically write into a contract (that can be difficult to enforce anyway) I think it's just not worth it to include any substantial ongoing work or services that need completion in deals that are as small as this one for a couple reasons:
1. If there's not enough money on the table then it's not worth the time, money and/or distraction pursue legal action
2. If I really wanted this additional guide to be created I should have set up a two stage payment contingent on the completion of the guide. i.e. $8,500 up front and $1,500 upon completion (duh I know)
Primary lesson learned: Once a seller has the money there is nothing stopping them from moving in except the threat (real or perceived) of legal action that depending on their location or deal size may or may not be feasible (or worth it).
Edit: After re-reading this post I think this lesson is pretty obvious so I think I should clarify by saying no matter how comfortable you feel with the seller there's no telling what they will do when the deal is done.
I'm still satisfied with the purchase though and after the minor misstep in the contract just thought I'd share the details of this sale in case anyone else is considering bundling on going work / services etc. into smaller deals so you can learn from my mistake.