Key conversion rate issue

[Konaya245]

Describe the bug

Old issue resurfacing. #272
Trade used my key selling rate when key is on their side of the trade, when trying to send change metal.

To Reproduce

Steps to reproduce the behavior:

1. Set noticeable difference in key rate, eg. buy 10ref/sell 25ref
2. Buyer only has key, no metals in inventory.
3. Buyer buy an item using chat command.
4. Bot sends offer for the key at their selling rate

Expected behavior

should be:

• Use key selling price for conversion when the partner is taking keys from the bot
• Use key buying price for conversion when the partner is giving keys to the bot

Screenshots and logs

Key rate: 56.55/86.22 ref
NC Tour of Duty Ticket - 25 ref / 25.11 ref
Guy canceled the trade and notified me of the issue.

Other trades:

Version: v5.13.0