Unless I know something specific or have a local contact, I am much more likely to look locally.

The problem with shipping is that you are importing something into the country. Each nation may have different rules including duties for importing things. If you don't follow, they get stuck and then knowledge of both local language and procedures are important.

One can find imported goods everywhere, but I'd rather someone else do that than me in middle of a trip. If I am going to bring something in, then rather as part of my possessions or via a courier (e.g. friend visiting) than shipping.