Meritline.com has the i-Blue747 High Sensitivity GPS Data Logger,W/16Mb Memory for $75 w/ free shipping. The i-Blue747 High Sensitivity GPS Data Logger,W/16Mb Memory features: With 16Mb memory for 100,000 way points record, Dual mode for both Data record and Navigation. Come up with a push button for recording data manually (Push to log), User can [...]