Your Domain Appraisal Opinion on Domain Names I Own

Hi, I want to know people's thoughts on their appraisal on domain names that I own or have owned in the past. I've been flipping domains as a side hobby from 2019 - 2022. I will have the price that I bought the domain name at and if sold, the price that I sold it for as a spoiler. Please don't downvote or be negative on anyone's opinion. This discussion is meant to view people's thoughts on the domain name market. Thanks!

IFO.com Bought for $30,000. Currently listed for sale at $59,000 and has been for 3 years.

PCK.com Bought for $20,000. Sold for $45,000 after 1 year of purchase.

SPQR.com Bought for $20,000. Am using this domain for my personal project.

i8a.com Bought for $500. Am using this domain for my personal project.

o-p.com Bought for $1525, Sold at $2,500.

vmlv.com Bought for $350. Sold for 100$.

ixjo.com Bought for $150. Sold for 110$.

SPQSR.com Registered the domain, deleted it because I didn't want it and no one else does.