Well I would say if you don't hear from the guy you should just order some stuff online and get it new, because sometimes you are just buying someones problems when you buy this stuff used. If you get on ebay you can find a secret jardin DR90II for less than 200 shipped in a discreet box. Also I say look on ebay as some of those tents are pretty good and come with free shipping, but be aware if it doesn't say anything about discreet shipping the tent may come shipped in it's original packaging. Also you can get T5's for pretty cheap and if your handy you can build your own. I would say build your own cloner because as stated above those EZ cloners are not really that "easy" to work with IME. A homemade bubble cloner with a heat mat works just as well, is significantly cheaper, and can be tailored to fit in the corner of the mother tent. Ballasts of good quality (digital) can be had from discount-hydro as they have quantums which you can upgrade the reflector for cheap as well. Also htg has pretty good prices on ventilation, so with your 800 I think I would and could buy a setup that was new and save myself the trouble of bargaining or buying faulty equipment.
Plus then you have the satisfaction of knowing that no one else knows about your grow and have no worries about rippers, because this is my biggest fear. You buy someone's "used" stuff then they wait a few months, let you get settled in and then they come steal all the shit back along with all your stuff and your harvest. For me having to include someone else to get this stuff is the deal breaker and I wouldn't go alone... Keep us posted and of course if you need some help looking for stuff new or building something drop another thread. Good luck and happy growing.
KnB