Long story short, right here we go.
Electro's came out, as you know. They got better and better, and people found ways to make them go ballistic and they were set on "semi auto". People shooting 17bps wasnt uncommon. So they started after a while, to regulate the bps of guns to make things safer, fairer with a view of promoting more moves etc. Guns went from 15bps max, then to 15bps ramping (basically, pull the trigger 4bps and it goes full auto if you maintain it) , then 12bps, then 10bps.
Meanwhile, Smart Parts were starting to churn out loads of starter electro markers. Basically, a simple body, with a simple board in the grip gun, and sold it at half the cost of a top end gun. BUT, the thing is, they werent a bad gun at all. They shot paint, and fast. They werent perfect, but you had £400 you didnt spend and could buy better paint. And other companies caught on, and now produce decent shooting guns, for half the price. You dont get the nice barrel kit, you dont get the uber bling anno job and super nice milling or whatever, but they are all far from ugly, and even Pro teams are shooting some of these guns, and winning major pro events aswell.
So anyway, theres "posh" electros, and there are "entry" electros , and these days, with everything regulated to 10.5 balls per second, you dont need that super nice £1000 marker. You can get a really good brand new gun for £300 -£400.
For example Ego LV1 £1080
http://shop.planeteclipse.com/product.asp?id=4672
Or the Etek 4 £465
http://shop.planeteclipse.com/product.asp?id=4503
Both guns still shoot 10.5bps at the same velocity.