Hi and thanks for reading this.
I have the opportunity to go to a guy's house on Sunday and check the used Skywatcher 150/750 Star Discovery GOTO scope he is selling. According to him the scope has only been used 3 tines and is basically new. However there is no warranty on the scope so he probably bought it quite some tine ago. Also according to him, it is in mint condition, scratch free. I managed to haggle down the price before even seeing it to about 50% retail. (220$-ish in my currency.) No additional eyepieces just the regular 10mm and 25mm.
Please help with the following: what are the possible errors and other pitfalls I should watch out for? How can I test the goto system and the electronic parts at daytime? How risky is it to buy a used, probably mostly unused scope with a goto system? I'm not new to astronomy, had a number of smaller scopes already but this is my first time with such an advanced system
All suggestions and opinions are welcome.