filtering

Hi
filtering has been vastly improved over the years but still misses what I would consider as an important feature that could be usefull to most coin collectors
It is not possible at this stage to select all coins that are either non precious or silver together, eventhought that is what most collectors actually do collect.
The answerscould be:
- add a "non-precious + silver" metal filter
- include silver in non-precious (at $0.5/g it is hardly a precious metal anymore...)
- have the possibility to select more than one metal (multiple filtering)
Hope this make sense
otherwise thank you for this wonderfull website that brings collectors together
best rgds
JM