Some math.
Assume you solved 1 captcha / min = 0.25CAPT/min = 15 CAPT/hr. With minimal wage in USA of $7,75/hr this corresponds to 1CAPT= $0.5 = 0.5/475BTC = 0.00105263BTC
Now, we know a lot of people are not making $7.75, and lot of people were earning 1CAPT in the beginning, but should the price be 2-3k? I don't think so.
$7.75/hr? You have to be joking, larger part of the population on this planet works for < $1/hr, even with the access to the computers and the internet. Who do you think solved all those captchas and is selling them for what is 1/200 of the price you calculated for $7.75hr?
That was an example. Thanks for helping. Sell all you want.