A used M6TTL in good shape can usually be found for around $1200-1600, and that's about what I paid for a used 75mm 'Lux, as well. Before investing that sort of money, it's a good idea to be sure that the rangefinder style of shooting works for you. Not everyone adapts to the difference in style. The new Bessa offers a good intro at a fairly reasonable price.
The ideal situation would be to find a Leica user in your area, and see if they'd let you try it out.
There are people like Neal describes, who keep their Leica gear unused in-box, but they are collectors, not photographers. My Leica gear works for a living.