Wasn’t the new FIAT 6616UB supposed to be tradeable?
Despite the presence of the coupons in the battle-pass progression line i still don’t see any on the marketplace.
IIRC you can only sell vehicles from recent battle pass or event after few days of the event/bp ending. So it should show up few days later
The coupon doesn’t become tradeable until ~75 days after it’s received, which usually means most don’t come on the market until the latter half of the next battle pass season, rather than right at the start
This is explained on the wiki
Will I be able to trade received coupons on the market?
Yes. However, not immediately. You must first make the coupon tradable with the Coupon Upgrade prize item, then wait until the resulting tradable coupon becomes available for sale on the Gaijin Marketplace. The date the coupon becomes tradable may vary per season but will not be less than 75 days after the upgrade.
The price of vehicles from the previous battlepass is usually pretty inflated when they first appear on the market anyway, so you don’t want to buy it straight away.
They get cheaper a few weeks later - towards the end of the current BP when more regular players’ coupons become tradeable, not just the players that bought BP levels to get the coupon early, or sweated 70+ special task medals for extra progress points.