I'd consider the crystal and Pokémon blue to be in the worst condition. The other 4 boxes are in pretty decent condition. The two best conditioned boxes are Pokémon silver, gold, and red. Pokémon yellows condition is somewhere in the middle.
Getting these less than 167 a pop is a pretty good steal imo get them while you can! In the photo It shows an PAL copy of red and crystal. The item "Pokemon Red Blue Yellow Gold Silver Crystal Complete In Box / Game Boy Nintendo" is in sale since Monday, November 30, 2020. This item is in the category "Video Games & Consoles\Video Games".
The seller is "babygirl82102" and is located in Yucca Valley, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Taiwan, South africa, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Barbados, Bermuda, Brunei darussalam, Bolivia, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Oman, Pakistan, Paraguay, Reunion, Uruguay.