I tend to donate building materials, working appliances and the like to Restore/Habitat for Humanity and anything else to Goodwill.  

You are just making a "donation" of the fee for her benefit.As @Dawn Anastasi said, you can also try more of a strong arm approach where you start pushing her to motivate and move her stuff.  

I am looking to buy one to fully restore and donate to the RV/MH Hall of Fame in Elkhart, Indiana.

If you wish to donate and pay-it-forward so I may do the same in the future, I would be forever grateful.

You might want to attend some council and mayoral functions, donate to their favorite charities...you know they say you have to pay to play.

Some tenants or owners are generous enough that they donate their time to call the city and post an anonymous complaint in your behalf right after you finish the sale, especially if they got kicked out or they are not happy in selling the house.

Throw out the stove and the full size refrigerator (sell it to a 2nd hand place or donate it).  

I might donate to the campaign.  

Like a dozen homemade chocolate cookies just call or get a free or low cost lottery ticket (proceeds to a church donation),  Meanwhile you get is a chance to meet them, ask for biz or referral and go from there.  

You can join with a donation to a cause (can't remember which, but you can find it on the website)