Here are 2 coins of Theodosius. The first was struck at Thessalonica, the second was issued at Antioch mint.
Mine was around $400 US and I bought it last December. I haven't been monitoring prices, but I don't think they would go for much more than what I paid. I've seen lesser examples for sale around $300 (I recall there were a few on Vcoins). There was a beautiful MS example for auction about a year ago that I bid on (my max was $800), but it hammered for $1400 and I was not willing to go that high. Hope this helps. Have a look at coinarchives.com for auction results.
I've always liked this type, which is rather scarce. It was probably minted briefly before Magnus Maximus invaded Italy in 387:
Earlier this year I picked up this galley type with some nice detail.. Theodosius I. Thessalonica mint
I have two fun Theodosii. This has a really neat bluish toning that shines in the right angles (below is not the right angle) This is literally twice as large, and although the standing reverse figure got decapitated, the kneeling figure's massive crown makes up for it.
Nice bronze coins of Theodosius I are not impossible to find. I bought this Theodosius AE-23 last month for EUR 56 on Ebay. I love the GLORIA ROMANORVM series with military bust. GLORIA ROMANORVM is quite a promise given that Rome had just received one of its most devastating blows in the form of the battle of Adrianople at which the Goths wiped out almost the entire eastern army, including its emperor. Rome was at the brink of disintegration when Theodosius came to the purple and he did a great job stabilizing and consolidating the situation, at least for the next years and decades. His foedus with the Goths, however, may have laid the foundation for the final collapse.
Did someone mention gold? Theodosius I the Great. 379-395 AD. Obverse shows the Emperor facing right with pearl diadem, cuirass and cloak. DNTHEODO SIUSPFAUG. Reverse shows Constantinopolis with mural crown, seated right, foot on prow, holding long scepter and a plain globus. The mural crown is uncommon. CONCOR DIAAUCCC dot. In exergue, CONOB Theodosius I fathered Arcadius and Honorius by his first wife, and Galla Placidia by his second. His reign was troubled by the revolts of Magnus Maximus and Eugenius (creature of Arbogast) in the West. He settled the Goths as foederati after some inconclusive warfare with them, which proved a fateful decision. Champion of Nicean orthodoxy, and a saint of the Eastern church. He signed the Edict of Thessalonica on February 27, 380 AD, making Catholic Christianity the official religion of the Roman Empire. Struck 380 AD. Purchased from Ed Waddell many years ago. A coin with the same dies sold in Triton VIII #1268 in Jan 2005 AD. Similar coin advertised in 6/2020 for by Munthandel G.Henzen.
The Christian symbol above the campgate is variously termed by catalogers: Christogram, Chi-Rho, Chrismon, Tau-Rho, & Staurogram. IMO: The latter 2 terms seem most accurate.
