humm.. I feel like I would want more than just the suit, but it it's a rare item. I had it at one point and looks like I sold it for 3500. I may value it more than that though. You can see what the market values it by going to sell it and it will show the market value. It may have changed since I sold it. But I would be happy to buy it for 10k.
You can buy the event knuffel for 4
in the Knufftropolis, so I was looking for about that value. soooo...
(actually it's 63,000 at average, I rounded down)
Let me know what you think! We can try to work something out.