The 1988 Panasonic DX-3000 was a decent quality bike. It shared some of the same Shimano 105 components as the higher DX-4000 model but there was a little mixing and matching going on to keep costs down slightly. The DX-3000 also came with Tange 2 tubing instead of the Tange 1 found on the DX-4000. These are good mid-level riders and a decent example can usually be had for $170 – $270 these days.