Ebay is "littered" with '96 thru '98 E's around $25k. Here are some prices of with the "Buy It Now" option:

'99 E320 Wagon
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1870756561
Buy It Now: $24.9K

'99 E320 Sedan
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1871073923
Buy It Now: $27k

'98 E320 Sedan
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1871101280
Buy It Now: $25.9k

'95 E320 Convertible
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1870969798
Buy It Now: $27.9 (71k Miles)