If you are not going to pick it up, than shipping will be out there.. And if you are not going to go see them in person than keep in mind that very nice and clean doesn't mean they will be so, nor does it mean it's what you may consider nice and clean!!
Name brand matters if you are going to resell.. Men clothing don't resell as well as women's so you should check prices out for those men sizes on ebay to see what they go for online.. Offline, there are not many consignment type stores that carry men clothing, nor do you often see men go into them for that matter..
If they were women or children clothing I would only pay $300 total for the bunch if I saw them in person.. And I wouldn't
buy the lot at all if it didn't include mostly name brands, nor if I or someone I know could not fit some of the clothing just incase they are not resellable..
takes more time but, you may be better off checking thrift stores/shops in decent living areas (that don't charge an arm and a leg for clothing).. They always have some nice, name brand clothing for all sizes with the price tags still on them..
I use to sell on ebay and this is my experience and thoughts on the matter