Its only a 1 wire mod, and that one wire is easy to do (compared to say the points on a PSX, DC or PS2).. Basically if you know how a soldering iron works, you can do it..
Only place I know of selling pre-modded units is playthegames.com and they are UNRELIABLE! AVOID THEM.. I'll shorten my usual rant and say that after not recieving the saturn mod I ordered, and being ignored on email and phone, I decided to drive to the 'retail location' (which is only about 20 minutes from where I live), and it DOESNT EXIST. The address is for some chinsey looking paintball supply shop. I went in and asked the guy about PTG.com and he played dumb (my guess is he or one of his friends runs the thing out of their basement, hence the craptastic web design).. Better Business Bureau cant help me because its not a real business. So all I can do is post this as often as I can to try and spread the word.
I'd recommend getting yourself a cheap model 2 Saturn, then sending it to Raven Games. They unfortunately will not fit a modchip, but they will do the country switch and 50/60Hz switch for around 40 pounds. As lancastoor says, the modchip is very easy to fit yourself. I think Lik-Sang still sell them.
Hmm, ok. Where would I get a cheapy Saturn from? There are no retailers in the south-west (uk) that sell any saturns, so, I'll most likely have to order online. I would try Ebay, but, I dont really trust anyone on there.
By the way, how hard is it to modify a saturn with a 50/60Hz switch?
Erm, I guess my first attempt would qualify as 'fucked over'. I dropped some solder on one of the memory chips (I was using a massive soldering irom, ok?). It's fine...as long as the game in question is only 3D. Any 2D 'ghosts' all over the screen.
The 'Mk. II' is now fully modded and re-assembled (with my new pen-tip iron), and was still a bargain, really - Â£20 for a new Saturn beats Â£40 for someone else to do it hands down