First time suggestion so I hope what I have is good enough for a 2 year outdated price.

Purchased a Clean Vintage Gentlemann's Service Medal for 844$ Marketplace.tf and a Duped Vintage Gentlemann's Service Medal #4858

https://imgur.com/CSDxvrE

https://imgur.com/U0RoBa2

Marketplace.tf money will be priced in keys at day of purchase.

844 / 1.86 = 453.76. Rounding to 453 Keys.

Duped Vintage Gentlemann's Service Medal #4858.

Originally Purchased for 200 keys.

https://imgur.com/qtyc6S4

https://imgur.com/ZS0CSpp

I have no knowledge of any other purchases made between May 22 2018 and Sep 14 2018.

1 on sell listing at 200 keys

1 on Marketplace.tf at $400 before my purchases and $800 after.

1 on SCM at ~$420

Taking 200 keys for the dupe, although depending on other purchases this could be lower/higher.

Taking 653 keys for the clean medal. .