If you look hard enough you can find etek 1s for a little over $100. It's a lot of marker for the price, considering its the same ball park as new spyders. A little more cash will get you an etek3 or ego7 in the low to mid 200s. The extra money is worth it, but if you are so hard up on cash you'd be better off saving that extra money you'd spend on an etek3/ego7 and spending it on paint and field fees.
Also, remember that the eteks/egos run on compressed air so you will need a tank. c02 is a no-no.