Where is a comparison of Apple Watch prices?

This is a user-to-user technical support forum. The volunteers here are not in the "price matching" business.

If what you really want is to compare Apple Watch models and features along with prices then start here

https://www.apple.com/watch/?afid=p238%7CsqmcpMr3Q-dc_mtid_1870765e38482_pcrid_601516710426_pgrid_50627848077_pntwk_g_pchan__pexid__&cid=aos-us-kwgo-watch--slid---product-

and then you can prices from

Watch - Apple