Timeshare resales has anyone dealt with a company called etoo?

I have a timeshare in Tenerife that has been for sale over 2yrs.I have tried to do this with an on site resale company with no success.I have been contacted by a company called etoo who say they will market it for �472 which will be refunded with the sale price has anyone had dealings with this company if so have they delivered the goods.Many Thanks