While it is temptingly cheap, you're not getting much.
Restoration to ANY form of 1896 Carbine, even the long-stocked version, is going to be expensive, very expensive.
I would also verify that the barrel actually is a full 22" - I know that pictures can be deceiving, and the bastard stock length only confuses matters, but it looks quite a bit shorter to me, more like 20" maybe.
I'd suggest saving your money and buying better. It is a buyer's market right now - "toy money" is dear, and prices/sales are definitely down from what they were a few years back.
The only saving grace is that it IS consecutive to a Rough Rider gun. Having said that, however, be aware that NO provenance is thereby given. A number HAS to be exact. And, having said THAT, I will point out that the records have not been found for ALL troops of the 1st USV - though they have been earnestly sought by people who knew what they were doing.
So, I guess there is a glimmer of hope. Your $$$, your choice!