The 1884O and the 1883S definitely look polished and have a low value as a result.
The 1878S looks to be in possibly MS62 condition (a little too much chatter for 63) which would put the value around $45-50. I don't know that I would pay the fees to send this one in.
The 1891S looks like it may be uncirculated. The luster looks a little off to me but that may just be the lighting. Even in MS60, this coin has a higher value ($60-65). This is probably the only one I'd consider sending in. Look at the luster closely first, though, as this coin may have been cleaned and will therefore be bodybagged from PCGS or NGC.
The 1891 looks to me to be an EF45 and a low value coin. I would not send this one in.
Hope this helps.
