Amazon.com : Nikon D3100 Digital SLR Camera with 18-55mm NIKKOR VR Lens - Red (International Model no Warranty) : Electronics
Voking VK900 flash for Nikon DSLR and mirrorless cameras - Nikon Rumors
Amazon.com : K&F Concept Camera Flash Speedlite with LCD Display, External Flash Speedlite Compatible with Canon Nikon Sony Olympus Pentax DSLR & Digital Cameras with Single-Contact Hot Shoe : Electronics
Nice manual flash for very little money... - PentaxForums.com
TTL Shoe Mount Flash with 52mm Lens Kit for Nikon D3100 D5500 D5300 D5200 D5100 D7000 D7100 D7200 - Walmart.com
Amazon.com : PHOTOOLEX FK300 Camera Flash Speedlite for Canon Nikon Sony Panasonic Olympus Fujifilm Pentax Sigma Minolta Leica and Other SLR Digital Cameras and Digital Cameras with Single Contact Hot Shoe :
Amazon.com : Metz MZ 52314N 52AF-1 Digital Flash for Nikon (Black) : On Camera Shoe Mount Flashes : Electronics