I have had a Czech Sports professional spring tension stringing machine for about 8 years. I was looking to sell this and was wondering if anyone knew anything about it or what it may be worth? I'm not sure on the model number, but it is a full standing model, not a tabletop. Everything works. My brother used to string professionally, but now that he's gone, and I've forgotten how to string ( stopped playing for 5 years due to elbow problems), I have no use for it. Thanks for the input.