Timeshare Investors of America Craig Rudolph Timeshare sales scam, Internet

I was contacted by this company yesterday offering to buy my Timeshare for a very good price. The catch was that I needed to send them a 10% deposit that they promised to refund when the sale closed in 120 days. Further, they would not take a credit card payment which would have insured the transaction from my end. They wanted a check ONLY! I offered them an even better deal (assuming their offer was real) which was to not make a deposit, but give them 10% of the procedes to KEEP once the transaction was finalized. They would not accept this deal, which a legitimate business would have surely accepted. These people are obviously racking up deposits while stringing along the sellers for as long as they can, and when everything crashes they'll pack up and move on to a new company name and start over. Prove me wrong please.