Native Spanish speaker here
Boleto Gratis.com - Free Ticket
Very good one. Easily 3-5K, even 8K, if you approach the right end users.
Brazalete De Oro.com - Gold Bracelet
Unattractive as a domain name. Not that we don't like them bracelets, but I don't see a website dedicated to them as a biz. $90-140 if you find an interested goldsmith/artisan/storefront owner. Most generics like brazaletes.com, anillos.com, aretes.com or zarcillos.com are taken but have been parked for eons, suggesting that potential end users' interest is low.
Comprar Linea.com - Buy Online
Huh? It reads as "Buy a Line" or "Buy Line". Here "line" is mostly used to describe a drawing with lines; we don't buy lines, not even a line of coke.
Juego De Citas.com - Dating Game
Unconventional and almost unattractive. Say $250 on a lucky day.
Pelota De Playa.com(s) - Beach Ball
Makes sense, but I wouldn't pay reg fee.
Piezas De Automoviles.com - Auto Parts
* A very special case.
* "Autopartes", although not "very Spanish" would make a great brand. This one would not.
* Makes perfect sense, descriptive, precise, and focused on a great niche, but a bit too long and we rarely use that particular wording.
* Since good available domains in this niche are scarce, a very solid established brick-and-mortar biz could pay you 2K as-is if you convince them about domain quality.
* IMHO, if you develop it and it gets good targeted traffic, value might skyrocket to 4K, even 8K if good monetization is shown.