Proof includes 8 ACTUAL SALES in the last month

So, I'm quickselling mine for 24 keys (I got it yesterday as part of a huge deal involving multiple unusuals and items) and a buyer asked me to prove that he could make profit on it. I tracked down sales and offers in the past month and decided to just use my research for a suggestion as well. Last suggestion had almost no proof.

Most of these are actual sales in the last month ---

PURE DEALS-

30 keys:

http://www.tf2outpost.com/trade/8529639 - sold for 1 buds + 3 keys (30 keys at the time)

27 keys:

http://www.tf2outpost.com/trade/8227955 - sold for 1 buds (at the time, 27 keys), also rejected offer of 26 keys

http://www.tf2outpost.com/trade/8259176 - sold for 1 buds (at the time, 27 keys), also rejected offer of 25 keys

http://www.tf2outpost.com/trade/8668649 - sold for b/o of 1 buds (at the time, 27 keys)

25 keys:

http://www.tf2outpost.com/trade/8759697 - unsure what it sold for but has 25 key offer

http://www.tf2outpost.com/trade/8669026 - 24 keys + sweets offer

http://www.tf2outpost.com/trade/8616016 - 24 and 25 key offers

24 keys:

http://www.tf2outpost.com/trade/3286825 - 24 key offer rejected

UNUSUAL DEALS:

http://www.tf2outpost.com/trade/8669026 - sold for 28 key unusual (bubbling crown)

http://www.tf2outpost.com/trade/3286825 - 28 keys in mixed (dogger+6-7 keys in sweets)

http://www.tf2outpost.com/trade/8937582 - 24 keys in unusuals rejected

There was another one sold for 28 keys in mixed (steaming bonk helm + 1 bills) but I can't seem to find that.

Conclusion: Many offers of 24 keys, most of them rejected - low end. Many sold at 27 keys pure. And one sold at 30 keys pure. I'll use 28 keys as the high end.