Nice laser, I’ve had my eye on one of these for a while myself. The cost should be under $200 total. The assembled diode with 3element lens is $106 at dtr laser shop. I wouldn’t buy a cheap Chinese driver but go with one from x-wossee on eBay.He has a good rep in the laser community and sells a5amp driver for about $40. That driver should be able to run from your ramps power supply a long as it meets the current requirements.