I've been there and done that and later on repurchased the same firearm I traded. Sellers remorse I guess but as long as the firearm your getting rid of can easily be obtained in the future then why not ?
At the time I sold the gun I didn't think I would miss it but
Soo...trade one gun and some cash for another gun? Is that your question?
Yes. I would do that if I wanted the new gun more than I wanted the money and the other gun.