I am wondering if anyone would have any idea what one of these would be worth to buy second hand?

I am being offered one of these but have been asked to set my own realistic price.

I have seen them online ranging from well over $200 to under $90 in a few different currencies.

if you were to buy one off trademe for example, how much would you pay for it? 

The item info:

3Com OfficeConnect Wireless 11g54Mbps Access Point 
Model: 3CRWE454G75
Website: http://www.3com.com/products/en_US/detail.jsp?tab=features&pathtype=purchase&sku=3CRWE454G75

I appreciate any help.