Hi
a bit late but here is some good info
A good store is CIA Alfaro on Via Argentina
www.cialfaro.com
last year i bought an Peavey AMp overthere.....they gave me a good deal...
always try to negociate !!!
and ofcourse here is full list :
http://www.paginasamarillas.com/paga...les-Panama.htm
Most of the prices are equal to those in the USA.