Disable possibility of purchasing song sheet for song you have in your songbook

[Disorder]

Hey, community members.

Title says it all, I believe.
Many times when I've been buying a song sheet from one of npcs that sell them I've been getting a sheet with a song I already have in a song book.

I found 400 - 500 gold pieces as pretty big amount for my style of playing and each time it's wasted on something you already possess isn't a good a good thing.

So, if it's possible to make a script that would prevent pc from buying song they already learned it will be great.

[Aethereal]

I always figured that if you didn't get the songsheet you wanted, it gave you something to trade to other bards or maybe PC merchants.

[Disorder]

That never really worked for me. I won't speculate much but combination of the factors like amount of bards on the server, song rarity, price other bards willing to pay and time zones made me think that it's better to make a suggestion.

Thinking more on this. If someone offers you an item while you trade, the buyer always has a chance to examine it in some way and confirm if that's the item they want to buy, only then handing over the gold. With the npcs that sell song sheets situation is opposite. I find that illogical.