Looks more like silver solder (which is what should be used in 'food prep/service' stainless steel) than lead ... you could take something kinda sharp , like an ice pick , or a nail & see if you 'dent' it with moderated pressure ... if it does not penetrate the mass , it's not lead (which is a good thing , if planning on selling it for food service/restaurant work) .
Not really the neatest torch work that I've ever seen , but if it's silver soldered, no big deal !
You might check around your area for a used restaurant supply house , for they may have sim. articles to get an idea on their prices over there in bean-town .
Here in Seattle , used ones sorta like yours would sell for around $250-350.
If you took the time to salt , scrape down , bleach & mineral-oil your wooden-top table , it would fetch around $400-$600 here , from a buyer who needed one !.
Boston has the beans , Seattle has the sound !