Kiloware has fallen apart in availability of postally used stamps. Must be careful of kiloware from the 80,s & 90's as a general rule this era of kiloware is extremely high amounts in current kiloware for sale. So this kiloware sould be cheaper than most. Need to be careful if possible not to get a lot that has been picked over full-on 30 x . It is hard to get real good kiloware in small bulk lots as the cost becomes a huge issue. As more people that want the kiloware than there is available.
This may be a dumb question, but when you say kiloware from the '80s and '90s, do you mean most of the stamps in it are from those years? Or do you mean the kiloware was literally put together back in the '80s/'90s and has been floating around since then, getting picked over and resold ever since? In the latter case, I suppose the contents wouldn't be much different than what I got way back then. I think to start with the only international kiloware I'd be disappointed with is one that was still mostly the same stamps I was finding in the corner store "kiloware" stamp packages over thirty years ago. Well, that or a truly massive quantity of duplicates...
Also, when you say "small bulk lot", what is small? A thousand or two stamps? And does a large lot arrive by the wheel barrow or or in a UHaul?