This is a Prussian medal quick reference index to guides available on eBay, written by eBay members.  It should provide the medal collector with a quick reference since it will be updated often.  If you know of a guide that you believe should be included, please notify me. 

• Iron Cross 
• http://reviews.ebay.com/Prussian-1813-Iron-Cross-1st-Class_W0QQugidZ10000000002253463
• http://reviews.ebay.com/Prussian-1813-Iron-Cross-2nd-Class_W0QQugidZ10000000002211135
• http://reviews.ebay.com/Prussian-1813-Iron-Cross-2nd-Class-Ribbon_W0QQugidZ10000000003412387 
• http://reviews.ebay.com/Iron-Cross-1870_W0QQugidZ10000000001433203
• http://reviews.ebay.com/Prussian-1870-Iron-Cross-2nd-Class_W0QQugidZ10000000003416571 
• http://reviews.ebay.com/Prussian-1870-Iron-Cross-2nd-Class-Devices_W0QQugidZ10000000003416594 
• http://reviews.ebay.com/Prussian-1870-Iron-Cross-2nd-Class-Ribbons_W0QQugidZ10000000003416581 
• http://reviews.ebay.com/Prussian-1914-Iron-Cross-1st-Class_W0QQugidZ10000000002388593
• http://reviews.ebay.com/Prussian-1914-Iron-Cross-2nd-Class_W0QQugidZ10000000002244946 
• http://reviews.ebay.com/Prussian-1914-Iron-Cross-2nd-Class-1918-1923_W0QQugidZ10000000002634601 
• http://reviews.ebay.com/Prussian-1914-Iron-Cross-2nd-Class-Ribbon_W0QQugidZ10000000003412465 
• http://reviews.ebay.com/German-Military-Medals-Badges_W0QQugidZ10000000001872462 
• http://testberichte.ebay.de/Vergleich-EKII-Ehrenkreuz-fuer-Frontkaempfer-1914-18_W0QQugidZ10000000001356455 
• Lifesaving Medals
• http://reviews.ebay.com/Prussia-Lifesaving-Medal-in-gold_W0QQugidZ10000000006515647
• http://reviews.ebay.com/Prussia-Lifesaving-Medal-in-silver_W0QQugidZ10000000006557573
• http://reviews.ebay.com/Prussia-Lifesaving-Medal-in-bronze_W0QQugidZ10000000006509113
• Commendation Awards
• http://reviews.ebay.com/Prussia-Award-Allerhoechste-Belobigung_W0QQugidZ10000000003590655
• 1897 Centenary Medal
• http://reviews.ebay.com/Prussian-1897-Centenary-Medal_W0QQugidZ10000000002369985 
• http://reviews.ebay.com/Prussian-1897-Centenary-Medal-Ribbons_W0QQugidZ10000000003410918 
• Long Service Awards
• http://reviews.ebay.com/Prussian-15-Year-Military-Long-Service-Cross_W0QQugidZ10000000002823423
• http://reviews.ebay.com/Prussian-15-Year-Military-Long-Service-Cross-Ribbon_W0QQugidZ10000000003413879 
• http://reviews.ebay.com/Prussian-Landwehr-Long-Service-Cross-1st-Class_W0QQugidZ10000000002811646
• http://reviews.ebay.com/Prussian-9-Year-Military-Long-Service-Medal_W0QQugidZ10000000002818097
• http://reviews.ebay.com/Prussian-Military-Long-Service-2nd-Class-Badge_W0QQugidZ10000000002814154
• http://reviews.ebay.com/Prussian-Military-Long-Service-2nd-Class-Badge-Ribbon_W0QQugidZ10000000003413427 
• http://reviews.ebay.com/Prussian-Military-Long-Service-3rd-Class-Badge_W0QQugidZ10000000002814505
• http://reviews.ebay.com/Prussian-Military-Long-Service-3rd-Class-Badge-Ribbon_W0QQugidZ10000000003413431 
• http://reviews.ebay.com/Prussian-Landwehr-Long-Service-2nd-Class-Badge_W0QQugidZ10000000002811254
• http://reviews.ebay.com/Prussian-Landwehr-Long-Service-2nd-Class-Badge-Ribbon_W0QQugidZ10000000003413407 
• http://reviews.ebay.com/Prussian-Landsturm-Long-Service-Badge_W0QQugidZ10000000003276847
• http://reviews.ebay.com/Prussian-Landsturm-Long-Service-Badge-Ribbon_W0QQugidZ10000000003413449 
• Ribbons
• http://testberichte.ebay.de/die-falschdeutung-von-uv-negativ_W0QQugidZ10000000000105095  Highly recommended German guide!
• Miscellaneous
• http://testberichte.ebay.de/russenkopien-fast-immer-als-original-auf-ebay_W0QQugidZ10000000002059190

Medal collecting can be very specific and the above guides are intended as an introduction.  Expert advise is often needed since the guides can not address every possible question - especially about a specific medal you may be looking at.  Please visit my blog (http://blogs.ebay.com/tsa-li) and/or guides for further information.  Thank you for your visit!