The DE-1 has grown into the most expensive F2 finder short of the sports finder - due the migration away from Photomics finders with dead electronics to a supposedly eternal solution and the DE-1 itself getting more scarce, being rather vulnerable to prism damage.
However, the DE-1 has no significant merits beyond looks and weight. Personally I'd get a dead pre-AI Photomic if I were in the market for a unmetered F2 finder - these are dirt cheap, and even broken or without a battery they'll display the aperture (in a much more legible form than the AI direct readout scale) and time in finder.