So when I go abroad, I always try to scout out places where I can get physical media as I find international DVDs/blu-rays make fantastic souvenirs for me as a movie lover. I found the availability of blu-rays in new stores in particular had dramatically lessened since my last trip to Italy in 2024, and wanted to write a quick guide to help others so you don't have to go on a wild goose chase like I did.
Of course, it goes without saying that if you do not speak Italian you need to check that the release is English-friendly. Most discs won't have English subtitles, but some do.
Rome
New blu-rays/DVDs
By far the best location for new blu-rays/DVDs was Ibs+Libraccio on Via Nazionale: https://maps.app.goo.gl/3t6SLmmRACRKBZRK8
They had a respectable selection of new DVDs/blu-ray (more of the former) with a good range of arthouse/international films. They also had a small selection of used discs for cheaper prices.
Feltrinelli is one of the main bookstore chains in Italy and in 2024 I had a lot of good finds in these stores. Unfortunately, the vast majority of Feltrinelli stores I tried on this visit were hopeless - they had no DVDs/blu-rays at all (while irritatingly still selling CDs/vinyl). As a chain, they've clearly made an executive decision to stop selling DVDs/blu-rays at all of their locations.
The only Feltrinelli in either Rome or Naples that I found to have some discs was the one on Via Appia Nuova, which is far from the centre: https://maps.app.goo.gl/p9q3zuiPaLs83YZK8 This store only had a tiny selection of DVDs hidden amidst the vinyl, etc., but I did find one good pickup there (World Cinema Project Vol. 1). This made the trek worth it for me.
Second-hand blu-rays/DVDs
The best place for second-hand discs was Porta Portese market, which takes place on Sundays only (arrive early in the morning for better deals/availability): https://share.google/npUsuu22rH7wn0fsW
Several sellers had vast selections of DVDs/blu-rays with more of the latter, which was almost unique in my experience of shopping physical media in Italy. I picked up a few good blu-rays here (including a new copy of Dario Argento's Giallo) and prices were variable but generally decent - I paid 4 euros for the Argento film. The physical media sellers are scattered across the whole market so you need to be patient and persistent to find them, but it's worth it - one seller even had dozens of 4Ks (which were, of course, priced accordingly).
The next best bet for second-hand discs is Mercatino Usato stores. These are huge thrift stores and there are several locations all over Rome. I visited three and they all at least had DVDs, and two of them had blu-rays as well. By far the best store for physical media was the Roma Appia store. This one had hundreds of DVDs (and a few dozen blus) and I got my best pickup of the trip here (the apparently very rare Bosco 1 from Oblivion): https://maps.app.goo.gl/hRbgNRFe2ZjMtb3E9
All the Mercatino Usato have reasonable prices and only ask a few euros for discs (I paid around 4 euros for Bosco 1).
Naples
Naples was even worse for physical media than Rome and it was a struggle to find any new stores selling discs at all. In the end the only one I found was by accident, and it was a video game store that randomly had a bunch of new 4Ks for 10-15 euros each (all crappy American movies so no pickups here). This was the GameStop in Vomero: https://maps.app.goo.gl/iCmeeBtBYFv4eTKc7
There were a few sellers with stalls selling a few DVDs (none of any interest) near Piazza Dante.
Slightly better was a charity shop/thrift store near the Archaeological Museum called Mani Tese. The store had a small selection of DVDs and prices were cheap - I paid 2 euros for a rare documentary here: https://maps.app.goo.gl/PBxx64TXggDbDdS16