Mystery Craigslist Turbo

[CTX-SLPR]

"Grand National high spool Turbo from Garrett 06559,PN# 104-1932, SN# 13166, (left mount) custom build with very low miles good for 450 hp, tested 24 psi boost. $ 300.00 OBO"

Found this on Craigslist and not being ANY form of an expert on turbos, what is this and is it any good/worth the money?

Thanks,