PLEASE NOTE: eBay does not offer "sealed" as a condition option, hence most eBayers list sealed records as "Mint". This can be misleading as Mint implies perfect. A brand new LP will rarely play perfectly. 
Aside from factory defects or poor quality vinyl, new records that don't play Minty at first might play darn near Mint with a good cleaning. New records often need to be cleaned because they are statically charged & will attract dust etc. Also new records can be contaminated with dust & grit from the factory or even some release agent from the manufacturing process. 

Aside from factory defects or poor quality vinyl, new records that don't play Minty at first might play darn near Mint with a good cleaning. New records often need to be cleaned because they are statically charged & will attract dust etc. Also new records can be contaminated with dust & grit from the factory or even some release agent from the manufacturing process.