I posted on FB Marketplace to check demand and was able to find people interested in paying $1200 for 1800 square foot garage.  

Apps like PayPal, Certified Cashiers Check or Money Order, or even invoicing through apps like quickbooks for them to pay are also great ways to collect. 

There have been one or two platforms that claimed that their goal was to eventually create a marketplace for investors to swap out any deal with another investor.

I just advertise on Zillow/ Hotpads/ Facebook Marketplace etc. and use a background check website.

I would also prepare to sell it on the used marketplace but if you absolutely don’t want to go that route then I would recommend getting it included in the purchase upfront (but still use it as a bargaining chip first).3) marketing: the best target audience is going to be a savvy house-hacker for a property this style.  

FB marketplace, join all the real estate FB groups for your area, REIA meetings, real estate meetups, talk to agents, get on Zillow and look for properties that look rehabbed/flipped and find out who sold it (the seller will be the investor you're looking for) and ask them if they want another hot deal in the same area.

If you're not too sure you can always hire a certified paralegal to assitn in filing court documents and arguments.The last time I paid a lawyer to file a contracts lawsuit for me...

I also use Zillow and even Facebook marketplace.

I also have lost out on a house because I was some dollars short of the 10%.I know the area and property quite well, and familiar with the foreclosure case for the particular property in question.The reason I ask is, because I am not physically in the area and wanted to see if any service exists, where they can bid on your behalf, when you tell them your maximum, and perhaps hook up with a HML, where the 10% down payment in certified funds is not a hinderance.

For snowbirds we get requests from Airbnb but if you are not seeing many month long type of requests try FB marketplace.