I'll be doing research myself so if I'll contribute if I find anything worth while.

Bottom line is I think you will find the weekend to be worthwhile and you should make some valuable connections, and it's a great introduction to the multi-family world. 

Unless they caused actual monetary damage to you, I don't see how a lawsuit would be worthwhile. 

I also do paid BPOs and sometimes take free BPOs, if I think it will be worthwhile.

If this is a great deal, you can be sure you have a clear title, and you have the cash, it may be worthwhile to do what he asks.

   $99 appears to be the current price on his website, and with a money back guarantee, a small and worthwhile investment, for my purposes.Hope this helps!

Just to get this out there, this is my first post on biggerpockets and I'm still figuring everything out, so apologies in advance if my post is in the wrong place or anything like that.I am just now starting to educat...

Still, it may be worthwhile to call the numbers and let them know what you have. 

I demonstrated a) the appraisal was faulty and/or inflated, based on the home's current condition, b) the listing price was inflated based on current comps, c) I needed to purchase at this price + rehabs in order to make some profit myself and thus make the project worthwhile, and d) I would do cash+3 week closing to give something worthwhile back to the seller. $50k was my opening offer and was accepted.

@Marek Narewski if you own in a high demand area, I'm of the opinion doing any significant rehab on an average (and higher) condition property is not worthwhile if you can get it rented under 30 days to get the cash flow rolling in.