Here's $50 to spend in any Book Culture location or online.  

Book Culture offers book shops where you can browse and discover the widest range of publications in the arts and humanities that can realistically be carried and they have created spaces for extensive representation of new books in areas you will not see elsewhere. They fulfill the essential role of being an independent source for ideas and literary art. A visit to one of their stores will energize your mind and remind you of the awesome scope of positive human intellectual and literary endeavor. Check out their convenient locations on the UWS and LIC. 

536 West 112th Street (b/t Broadway and Amsterdam)
2915 Broadway (at 114th St)
26-09 Jackson Ave (near Ct. Square)

https://www.bookculture.com/