[magus]

Very Few Blocks

 
Lemon source   USEDCARLOT
Minor considerations?   LITTLEONES [they’re also major considerations]

 
Parts counterparts   LABORCOSTS [not parallel: “labor” is the counterpart of “parts”; the counterpart of “labor costs” would be “parts costs”]

I appreciate the difficulty of making this puzzle, and any puzzle referencing the Venerable Bede is okay in my book, but…
Rating:
Three grins = Excellent: Loved it; Two grins = Good: Enjoyed it; One grin = Satisfactory: A bit bland for my taste; One teardrop = Unsatisfying: No fun