It depends on the company, of course. Some are likely to be more ethical than others. For example, one company that seems to come up looking good when I look into the industry is Proverbs Home Buyers. They seem to have a good reputation and have been around for a while.
I advise avoiding any home buyer in Gettysburg that appears to be brand new. Cash buyers are the best home buyers who can provide quick proof of funds. This lets you know they are serious about making the purchase stick and are not just wasting your time with offers they cannot cover.
Cash buyers can seem a bit seedy at first, but the companies that have been around for years have a strong reputation and, in my opinion, can be trusted to complete the sale in a professional, timely manner.