Question, where's this "minimum 2 sales" rule come from?

if more sales exist you need to use them.

You need a minimum of 1 sale to price something if theres no other sales besides those. On this case you got a lot of them and they're all valid, you NEED to use them. Read the guides properly for once.

for Unusuals, you need to include all sales in the past 2-3 months. If you don't you can miss a lot of potential data points

Hello. No, this is not how unusual suggestions work. You need to look at ALL sales that are available to you, and make a price suggestion based on that.

Here's an extremely easy sale that you could've easily found:

Sold for $31.99 on Marketplace(~17 Keys using 1.9 value)

https://marketplace.tf/items/tf2/31146;5;u158

From what we have to work with in this suggestion, there's no reason that 17 should be an outlier. Of course, that's where you have to come in and you have to find sales to make sure 17 actually fits into the range.

Here's what you should do if you plan on resuggesting this: Look into all the histories birb provided to you and look for sales, then determine a viable range based on those sales. A resuggestion with just these 3 sales is not going to get accepted.

I took a quick look through those histories myself and was able to find at LEAST two valid sales, but I'll leave it up to you to find them yourself.

Closing.