About 3000 dollars.But I started when 5 mw greens were 600 from Casix.I have a 5 and 10mw casix, which both make 8mw.The 5mw spec one has great beam quality, but the cr123 lithium does nothing for power stability.The pump is a 1 watt polaroid 808nm diode.I built a red 20mw pointer out of a module and a 6 D-cell maglight.I machined a surplus pulley into a module heatsink which fits perfectly where the old reflector went.In the case are 2 D cells and a spacer.It is a lot of fun...and the module was 500 but I got a discount to 265.That should tell you how old that is.It is a 650nm and my only red laser with a clearly visible beam without resorting to tricks to see it.My newest addition is a wicked lasers evo pro in 40mw.I am especially pleased that someone finally decided to use AA size cells.As if any AAA cells can even begin to operate a decent pump diode for any length of time!!!!Way cheaper than lithiums too!I found this forum after I had already ordered the unit.So far all I can say is the Evo pro is EPIC.Just fantastic.It is stable, and very powerful.I had dealt with wicked before...I bought a core for a friend.I tested it and was very, very impressed.
I have to say I laugh at the whole "wicked is expensive" stuff I have read here but, in fairness, I am comparing prices to the hoary past.(my 10mw Casix was 985!!!!!!)
I started when laser pointers were first coming out with diodes in them, and the first laser I played with was a HENE.I am amazed at how much power one can get today so cheaply.I am not going any higher in power than the 40mw 532nm I just got....it is more than sufficient for my experiments and general playing around....and I have no interest in burning.If I did, I know a man with a 40 watt argon.You know the laser is too big if just pointing it in the air requires coordination from the FAA!It is a cutting laser that is robotic.Quite cool.
I guess you can run amok today with way less than I have spent.But I don't regret it.And now that I am a married man , toys have to cost less.