these days i never need to buy straps and similar accesories [bags, cases, capos etc]
because its so easy to accumalate a miscellany of such items bundled in when buying cheap 2nd hand instruments, or getting good all in deals on end of line discounted new ones..

eg, reasonable quality 'no name' leather mandolin/banjo strap
included with bargain mandolin off ebay recently

but i do still keep a look out for 'found' items; that, with a minimum of imagination and resourcefull modification, can be utilized
as genuinely effective instrument accessories..

eg 2 compartment tennis shoulder holdall lined with heavy duty binbags and stuffed with bubble wrap as a convenient
bag for transporting 2 mandolins and a preamp & leads as hand luggage on public transport..

obviously, i'm not so impoverished i cant afford to take advantage of occasional cheap instrument deals, but my need to be resourcefull
is born from a 1/4 century experience of living the 'punk/indie' ethic
of stretching out extremely limited budget to gain maximum benefit