Very general assumption for speakers about 10% of the retail cost is parts and construction. So a $1000 speaker is about $100 parts and construction, with cheapish quality and likewise potential sound from say unethical near child labor mass produced sweat shop $3-20 tweeters and woofers, the crossover circuit, wood and finishing etc. A $3000 speaker likewise about $300 parts and construction but the driver cost allocation can start to move away from sweat shop class to name brand drivers like Vifa or lower end Seas or Scanspeak makers with potentially better sound capability. Moving further up in cost say $10k the speaker might have $1000 worth of parts and construction and there might be the mid to upper end models of Seas or Scanspeak drivers with great sound quality and detail.
In this general assumption equation the electrical crossover parts the capacitors and inductors that divide the freq between tweeters and woofer gets better quality in higher cost speaker such as instead of using cheap 50c electrolytic capacitors you get $3-10+ polyester film capacitors with better detail sound etc.
Other factors come into play such as the overall design, use of fancier cabinet materials and shape etc.
The main speaker driver makers n general order from low to high quality are non brand cheap types, Dayton, Vifa, Peerless, Morel, Scanspeak / Seas / Dynaudio / Eton / ATC / Focal all on par, Accuton and others that make in house like Kef and B&W etc.
This is a very general explanation and there is more to what makes a good sounding speaker and $50k speakers can be found with $30 tweeters that still sound good. Until one has an idea about these things and/or has experienced enough speakers you would not be able to tell much. You can google for driver types and costs to get a visual impression of what they look like. In general speaker brand order of low to high the usual list goes something like white van type speakers with no reputable name like Welling, NB Acoustic and many others, Dali, Sony low end, Jamo low to hi, Yamaha low and high end, Dynaudio mid to hi, Monitor Audio, Krix, VAF mid to hi, Focal mid to hi, PMC, B&W mid to hi, Martin Logan, Wilson hi end etc.