This is a fairly standard metal and glass ink well set from probably 1880's-1910's. A lot of companies made these, and I'm no collector, but I can say if it was made by Eagle, it would be marked as such. I suspect one of the many, many manufacturers. It seems fairly well-made, though I suspect it's pot-metal rather than bronze. it's also nice that you have the little metal caps for the inkwells, which is less common.
BTW, these were made for dip pens, not fountain pens.
Like I said, I'm no collector. If this is pot metal I'd take a wild guess of maybe $35-$45, mainly because of the lids. If it's bronze it would be more. Total guesses, so don't take it for more authoritative than it is. (which is not terribly much)
“When the historians of education do equal and exact justice to all who have contributed toward educational progress, they will devote several pages to those revolutionists who invented steel pens and blackboards.” V.T. Thayer, 1928
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