@Marilyn MikeI look at the county to get recent sales from county records.

Hello BP,I'm negotiating a sales contract for a property located in 21229 area.  

I do old fashioned way, buy paper and electronically research each one, we have been refining a list of about 5,000 for this years sale...

Contact them and tell them about the property you have for sale in their neighborhood. 

Contact them and tell them about the property you have for sale in their neighborhood. 

Then, after the sale of this other house which is worth 100k, he would give me the other 40k.

Did you require a personal guarantee or have some sort of due on sale clause similar to what a commercial promissory note would have?

Seller will call when title is clear and won't if it doesn't clear the ones that end up not clearing end up tax sales....now those have some spreads in them (and all the investors said amen)......idk just my personal opinion on it......we put in 40-50 (of those 2-5 get accepted) offers a week.....if can't clear title I need my earnest back for another deal....I always let them know to call me if they get it sorted out.....

If you think you'll sell your current properties in a few years, build up the equity and pay them down now so you can be in a better position to roll the money from those sales into other properties.

Try not to tie up your purchasing power on this deal.