Social Tradia is a legit site. They will ask you for recent stats though. I suggest reviving your account before you reach out to them. Get some viral posts going by reposting popular reels or posts in your niche.

Check your Explore page and see what is doing well - repost but give credit to the original account. If a few of your posts make it to the explore page, that will drive up engagement and make your account more valuable.

Hope this helps!