What are you gambling with if you buy a male? You aren't. Desert males have no problem with reproducing the gene. You aren't gambling. If anything you would be protecting the investment knowing that only males can reproduce it and the market won't get flooded with another co-dom. The only problem I could see with it is selling the females. Well sell them extremely cheap if you are convinced they won't produce. Males will still grab a fair price for some time. And I've still seen people throw $1500 at desert females (recently).
Also you gamble when you buy any animal. You gamble with it's life (whether it will thrive), whether or not it will reproduce, be a strong breeder, etc. This gamble is no different. If you are in it for the long haul then $2000 is nothing. You'll spend that on plenty of animals before it's all said and done, and I'd bet that not all of them will breed successfully. This whole industry is a gamble.
People that wait to get into the project are just losing valuable time and money with the gene. A couple thousand is pocket change in this industry. Look at the money a world first grabs or a new gene from Africa. There are still HUNDREDS of worlds first yet to be created with this gene. And by the time all the nay sayers get one, it'll be to late and deserts (single gene) will be like the spider, pinstripe and everyting else.... CHEAP!