nice hack and slash jrpg with great story for minimal price!

How much is minimal?

Anyway, if you want mindless hack and slash with cute girl, Neptunia U is currently on sale for $3.

For $0 you can get http://store.steampowered.com/app/351640/Eternal_Senia/
Nice stroy

Hmm, you mean something like this ?
http://store.steampowered.com/app/70400/Recettear_An_Item_Shops_Tale/

or more like this
http://store.steampowered.com/app/460120/Megadimension_Neptunia_VII/

Dungeon Siege Collection http://store.steampowered.com/sub/12086/
http://store.steampowered.com/app/345180/Victor_Vran_ARPG/
http://store.steampowered.com/app/475150/Titan_Quest_Anniversary_Edition/
The Incredible Adventures of Van Helsing Anthology http://store.steampowered.com/sub/75825/
http://store.steampowered.com/app/400170/The_Incredible_Adventures_of_Van_Helsing_Final_Cut/

Recettear is one of the cutest time sinks ever
as suggested above by ninosaksel

shop keeper rpg
random dungeon crawling rpg!
humor, very cutesy since its from the pov of a young girl.
a variety of characters to play \ interact with.

there's one hyperdimension game at 90% hack and slash. don't remember the name

CrossCode it's about to leave early access. So far it's great, but price's not so minimal

Way of the Samurai 3 & 4 on Steam. Pretty hack and slashy, good story, fairly cheap, I loved them both.