Is this tama rare?

Hi my mom got me an oshu/mechu pair. Are these rare?

They're vintage, but not really 'rare'.

The name is also actually OsutchiMesutchi pairs.

What colors are they? Are they a matching pair? It's nice to have a matching pair (I have the translucent black and clear set) but then I also have a cute mismatched set (lime green and white and [almost] solid pink). I think some colors are rarer than others, and they seem to be getting more expensive when they show up on ebay, which would (to me) seem to indicate that they are getting rarer. I love my Mesus/Osus, they're so cute!; make sure to thank your mom for such a nice set of tamas.