Shimano 105 is not junk...You will need take into account that this forum is great for determining value of old components but the fact that you are a flipper wanting to exploit the wisest community of cyclists for profit is somewhat annoying.
Perhaps you should have inquired about the quality and level of components function rather than monetary value. I think you would have gotten a much more positive response that way.
Good luck. 40$ and a Burrito plus you pay for shipping and I'll call it a deal!