Hello all, asking for advice here on whether I should just trade in my car ( free hassle ) or try to sell myself if I do purchase a new car.

I plan to get a new car next year, currently 2 of my old cars is a 04' Volvo S60, and a 06' Mitsubishi Oultander VRX, I did inquire to the salesperson of the car brand I want to buy, he said that trade in does not limit quantity, but the price they open will obviously be the lowest possible, since they are just simply selling to their secondhand car partner, so in this case, they quote me on surface 1K for the volvo, and "few Ks" for the mitsubishi, is it worth it to just trade in to them or try to sell myself in my situation ?