The rules for Runesmithing in the Black Fire Pass / Book of Grudges supplement say you can only strike a rune on an item of Superior Quality. They then dive into some fairly intricate levels of detail on how a PC can go about making their own Superior items to save them the cost of buying them. Basically spending time and making a die roll to save a lot of money.
Problem is, the rules all hinge upon percentages of the cost of a purchased item. Raw materials cost 1/4 that of the finished item. That's fine when you're making a Rune Axe or a Rune Platemail (since they have prices in the book), but it's rather trickier in the case of a Runic Amulet.
I could see a case for the amulet costing less than a superior hand weapon. The hand weapon at least does something before you stick a rune on it, and the superior quality means a bonus fortune die on attack rolls. In contrast to that, the amulet is mechanically nothing but window-dressing till you stick a rune on it. From a gaming perspective, it seems odd to charge the PC a premium for a thing that is useless till they spend further XP, time and money striking a Rune on it.
On the other hand, I can see a case for the amulet costing more than a superior hand weapon. A superior quality weapon may just be well-balanced and stoutly made. It's not necessariy covered with gold filligree or precious gems. A superior-quality amulet seems rather more likely to have such ostentatious bling on it, raising the price. So from a setting perspective, I could see such an item having a really high price tag.
In TEW, there's a necklace in a treasure horde that's worth 50 silvers. That's the amount the PCs can get for it at a pawn shop or fence, so probably only a fraction of its original sale price. We're also not told whether that's a superior-quality item or not.
Any suggestions on pricing and availability would be welcome.
My first stab at it was 1 Gold. In game terms that seems a little too expensive, but from a setting perspective it seems way too cheap. I'm really torn on this.
TL;DR version: How much do you think a superior amulet should cost the PC?