I used to work for a timeshare-selling company, and it sounds just like the way that appointments were made for our sales people to try to sell "membership" to the "holiday club" which consisted of a load of timeshare companies. My company is no longer trading, and I have not heard of Select Holidays, but it sounds similar
Something else that might help is that I have also booked flights with companies as two seperate transactions (instead of as a return journey, book as two singles). You are sometimes offered different prices to return bookings, and the journey from Europe is charged on Euros instead of pounds. Sometimes it works in your favour, sometimes not
Hope this all helps
Jon