You may not be aware of it but there is a set price for Blue Label Glocks and GT sells them for that price as most true Blue Label Dealers do. They should be charging these prices. Most c models have been discontinued.Glock model 17, 19, 22,23,26,27,31,32,33 $398.20 + Tax
Glock model 17C, 19C, 22C, 23C, 31C, 32C $422.40 + Tax
Glock model 20, 21, 21SF, 29, 30, 30SF, 36 $464.20 + Tax
Glock model 20C, 21C $508.20 + Tax
Glock model 34, 35 $480.70, + Tax
Glock model 37, 38, 39 $414.70 + Tax
If retail stores were required to sell at those prices, they would be selling at a loss.
Most Blue Label Dealers also sell non Blue Label Pistols and they cost more.
I'll second that. Scottsdale Gun Club sells blue label to those who qualify for the price you listed. They also sell white label Glocks to those that don't qualify for blue label at regular retail prices.