What can I buy with US$17.55

You can buy one of the following:

Rock of crack cocaine
Crack cocaine rock, 0.15 gram for £10 (US$15.34) from drugscope
Mr Potato Head
Retro toys for £10 (US$15.34) from hawkin
Mr Funny Face
Retro toys for £10 (US$15.34) from hawkin
Manic Panic Amplified Long-Lasting Hair Dye
Cosmetics for US$15.99 from vampirefreaks
Safety Pin Bracelets
Arts and craft for £9.99 (US$15.32) from hawkin