on one side it will allow from the player easier home monitorine without having to log on pro and manual search.
on the other side maintaining online forum shops will be a lot easier, you put all sellable items on other account used for storage and get all items form that character on the shop.
prices can the added manually from the shop page through an html element added for the needed pokemon by the poster or left blank for price discussion.
Shop lists can be updated when ?? when a user trade is complete, might also keep track of lend trade or when a "shop sync bit" is set in game on the pokemon ?
This is also a small implementation suggestion for the "bank" subject on the suggestion list already "accepted" here.
For security concerns, it could be done that forum interfact hides in a special box the pokemon by default unless added by the poster.
For identification purpose, it can be done with gitlab-like id purpose with keys tokens and stuff as argument in the url.
About security issues, since story service exists and is aknoledged and accepted by the trade mods, a read-only access through security tokens is less of a risk.
+ will allow and make player shops a lot more maintanable, allow to avoid the feilds of crosses items in a list of screen shots
+ allow for more free monitoring of pokemon
- security concerns
- server ressource cost
- work to do