Sorry sorry sorry...
Not a problem. Make it a rule.
I think moderators need to decide if they want to support sellers or buyers. Asking to advertise price on every listing is supporting buyers. Asking not to offer any other price for the same product is supporting and protecting sellers.
Amazon, eBay, etc. for example want less listings and more competition to attract more potential buyers and make less mess with multiple listings.
Buyers, please ask the seller if flacourtia indica seeds are viable as usually these seeds will likely be sterile if not pollinated by a male tree.
Sterile seeds for that price is not so good investment.