i presume you are buying returns declared (un-checked) and sold as seen. you can find supplies on ebay. also you have to aim for buying the same type and brands of stock example cordless drills. . . as you can replace the broken chargers or drills to make good and some electronic knowlege is a great leap to making money with these items. the last thing you need is to loose money which is possible if you can’t fix enough of them to sell on or get a BAD pallet as this can happen. also all your other expenses. i recomend to you to just stick to a 1 or 2 trade days an get p/t job to see the potential of your business first before you jump in the deep end as i see (pallet) traders come and go all the time. good luck.