Currently there is no tally made on your profile for prices entered or collection value. I'm not certain how many people use these fields to begin with. I have seen this type of thing used on other sites, for example the toys collecting site shmax.com:
https://www.shmax.com/tripredacus/statisticsAnd that is a good example for me to introduce this word of caution. As shown on that link, that site says my collection is worth just under $5,000, but this is not accurate. That price indicator is
not market value of my collection, but the value determined on these two factors:
1. It only counts items that have price data entered. Since I do not put in price data, any items in my collection without price data do not count towards the total.
2. Prices paid per item are determined by other collectors. With the exception of retail products, collectors aren't known to actually pay market value for items that they buy. Something might be worth $100 in the secondary market, but I paid $20 for it.
Basically, collection value calculators are unreliable because items without price data are not counted and collectors (on average) do not pay market value.So in the end, I think that while it is possible to do the thing you ask, it is ultimately not worthwhile to implement a valuation system... unless a developer were to do it because they could. And for why there is even one on that other site... well they did have an accurate market valuation system in place, but it could not be worked out with the data provider any longer and the function was reverted to reflecting values based solely on user input.