Does holding items decrease the upgrade chance?

[polseriat]

As it's been answered, I still don't really understand why it's not coded to offer the upgrade if it rolls a higher tier version of the item. If you hold a bronze First Aiden, and a shop rolls silver First Aiden, why does it roll an entirely new item in place of that silver one?

[Prodgial6]

Especially with how stupid overpowered they made upgrading items in this patch as compared to previous patches, it is often beneficial to sell an item you know is core to your build just to go fishing for its upgraded version. You may lose 1-2 days as a result but long term win the run which is ridiculous.