After having actually visited Bolivia, and in particular its bigger outdoor markets, I have come to the realization that any 50 or 100 Bolivianos banknote from either 1911 or the overstamped 1929 version of the same notes, are actually scarce and undervalued in the catalog. Hence, upon my return, I have been keeping my eyes open for pick 119, which is the 100 Boliviano banknote from 1911, without overstamp, to complete the set. Finally I had to settle on a note that is in VG condition, and ended up paying $21 for it. However, as I said, this note is scarce because even though I was able to find lots of banknotes in Bolivia, there was only one person who had any 50 or 100 Boliviano notes from this era. The few that this person had were in bad shape anyhow, and were going for approximately 2.5x face value, which would put my latest purchase at a street price, in Bolivia, of nearly $40USD.
If you are looking to complete a set, or collect this one, I suggest snatching up any 50 and 100 Boliviano notes that are under $20 and $40, respectively, that can be found on eBay. Here is the one I managed to win: