SAN DIEGO (AP) — California home sales slid last month amid tight supplies, while prices held steady, a research firm said Tuesday. There were 33,429 new and existing houses and condominiums sold in November, down 10.8 percent from 37,481 sales the same period last year, DataQuick said. The median sales price was $360,000, up 23.7 percent from $291,000 the same period last year but up only 0.8 percent from $357,000 October.