I'm with you on the trade in thing.
2019 was my year for dating different phones, other than the Pixels I've used for years. I tried the Pixel XL, still have it, the 3a, 3aXL, and the Note 10+, all of which were sold.
The 3, or the 3XL will be traded in on whatever model P4 I get. After using all those phones I am currently using the P3, I love this little guy, we're having a bronemance
EDIT: Since I will be trading one phone in, I am not to worried about the price. I will be getting one of the P4 64GB models. If I was ordering now, it would be the Pixel 3.