Why is Stanley cordless tools not sold as solo tool only? Every tool comes with 2 batteries & charger. Do tool shops sell them solo? So far I checked online only.

Planning to buy the Milwaukee M12 combo set.
Actually wanted to get a set of 18/20 volts tools for home DIY stuff but seems like the M12 is good enough for most work and much cheaper.
Looked at Bosch and Makita tools as well but Bosch is mostly brushed tools for the more affordable ones and Makita brushless is quite expensive.

Hikoki seems to be not so well supported as there are only a few sellers online and prices are quite steep. There is one good combo with 4 tools under RM2k but every solo tool is at least RM1k. I remember Hitachi tools used to be quite cheap and abundant not so long ago.

My main question- is it a good idea to go for M12 tools or should I spend more to get the 18/20 volts from other brands? I prefer not to different battery systems but somehow it seems unavoidable.

Thanks Sis. Bought the M12 combo set. It's far more powerful than I expected. Very happy with my purchase.
Don't plan to use impact wrenches, so no worries there. However, I do need some other tools like a sander, circular saw and vacuum. Might get these later from a different brand and maintain a separate 18 volt system. Milwaukee M12 standalone tools are quite expensive and not really worth it for me as I am just a DIYer.