IMHO the Bulgy is more collectible than the IJ-70. The IJ-70 is at the bottom of any PM collectible list.(Commercial, with no provenance and an iffy target sight. Early production for an IJ-70 is 1992. Widely available).
But, the Bulgarian 80s circle ten, is also close to the bottom in collector interest because they are widely available. In comparison to the Russian commercial Mak, many Bulgarian commercial Maks are worth more in collector interest than the circa 1980's circle tens.
Both have Makarov PM DNA. I have an example of each and appreciate them for what they are.
Keep the Bulgarian.