While it's generally true that you get what you pay for, it isn't necessarily the case with pickups. Now, I'm not going to say that Seymour Duncan, DiMarzio, Lace, or any number of American pup companies are substandard in any way. They all make great pups. BUT they have a name, reputation, and production costs to consider, so you're partially paying for 1) the name and 2) American production. GFS pups are made in China by Artec. Many folks here have used them and nobody has had anything bad to say about them. You can find them on eBay from a number of different sellers cheaper than through GFS.
Just a thought. Personally, I have guitars with Artec, Bartolini, Bill Lawrence, Gibson, DiMarzio, and Gretsch pups, and they ALL have unique and desirable sounds.