thats a good deal, the price would usually be much higher if you bought em from o-like, lazerer or rayfoss, go buy it from him, sounds like a great deal :)
LOL YOUR TOO YOUNG! just kidding, im 14 too :) i dont have a job either, my dad just gives me money if i want lol :p but you could also try to build your own laser? :)
i found one on o-like that looks exactly like your link lols :D
Old style red laser 200mW/adjustable [OLRLA200] - $43.00 : Zen Cart!, The Art of E-commerce
i dont know about ir filters and lenses, but if you bought this laser remember to follow the duty cycle: Recommended Duty Cycle: 45 seconds on, 30 seconds off