Have a look at this thread:
http://www.archery-interchange.com/f...tml#post104624
You can still buy GM's new for around 100 Euros. Try a search on Google. The other good thing about the GM is that many people buy them as their first "proper" bow, then after they've had them for a year or so get seduced into buying something "better" and the GM ends up on ebay.
I would expect to pay 1/2 to 2/3 the new price depending on condition. Oddly they seem to hold their price very well in the US.
I wouldn't buy a "retired" set-up if I were you, you won't be happy with out-of-date kit for long. Concentrate on getting a good riser and a good pair of limbs and the best sight you can afford at the moment and buy the rest as you develop. And don't go too mad on the limb poundage 45 lbs for a beginner is far too much unless you're built like a gorilla and even then .... Without knowing more about you I would say something in the mid to low 30's would be more like it. With your draw length and a lightish arrow 34/36 lbs should get you out to 100 yards without too much problem.