How do I wire Aukro.cz + Zboží.cz + Alza.cz marketplace feeds?

Three more CZ marketplaces matter beyond Heureka.cz:

• Aukro.cz, the Czech auction site (similar to eBay). Listing API + order import. Best for end-of-line, refurbished, second-hand, or niche inventory. Magento → Aukro feed pushes listings, Aukro → Magento pulls orders on win.
• Zboží.cz, Seznam.cz’s price-comparison engine (Seznam is Czechia’s home-grown search engine, still ~25% share vs Google). XML feed similar to Heureka but a different schema + category tree. Less critical than Heureka but a free traffic source if you’re already maintaining a Heureka feed.
• Alza.cz, Czechia’s #1 electronics retailer (~CZK 50B+ revenue) which also runs a marketplace (Alza Marketplace). API-driven, stricter category + content rules than Heureka. Volume can be enormous for electronics / tech / accessories sellers.

We typically ship Heureka first (highest ROI), Zboží second (cheap to add once Heureka exists), then Aukro + Alza as separate projects depending on the merchant’s SKU mix.