I don't see how a price guide like this would be feasible, and here's why.
If this stuff was being manufactured and sold as new, then the manufacturer's costs and profit margin would determine the cost price per unit. The retailer's profit margin would then determine the retail price to the end user.
However, all of this stuff is second hand, which means there is no suggested retail price from the manufacture. The main factors influencing the cost are how little the seller is prepared to accept for their property, and how much the buyer is prepared to pay for it.
Since these values will vary greatly depending on the age and condition of the item, availability of the type of product, rarity, location etc etc, it would be impossible to "suggest" a cost for such an item.
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moto
