Are there any trades at 4 at all? If you can't find any, or can only find 4 key sellers that haven't sold, it may be worth while to close this and suggest a 3 key flat price.

Your links show 1 sold for 4 keys in under a day, and a 4 hour old trade which hasn't been bumped half the time. You'll need to show them either A: Bought recently at 3 keys or B: Unsold for over a day with no willing buyers. Please provide this proof next time :)

Before Christmas I sold these easy for 4 keys. Now they don't sell at all for 4 keys. I've had one up for a week.