Four tiers per brand: RZX 60/70/80/90 and RZ 70/80/800/900

Model name is display only; performance and price follow brand and tier.
Tier physical traits: power pins 6/8/8/8+8 and fans 1/2/3/3.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/Decentralized/UsedDealerClient.cs

@@ -18,7 +18,7 @@ namespace Decentralized
         public static void Subscribe()
         {
             ModHook.OnGenerateCustomerNormal += OnGenerate;
-            ModHelper.AddAppraisalItem(ModInfo.Id, Appraisal, Items.GpuId("RZX50"), 2, CreateForAppraisal, u => (int)CardValue.True(Items.ToUnit(u)),
+            ModHelper.AddAppraisalItem(ModInfo.Id, Appraisal, Items.GpuId("RZX60"), 2, CreateForAppraisal, u => (int)CardValue.True(Items.ToUnit(u)),
                 Items.IsGpu, null, () => L.T("appraisal.gpu"));
             ModHelper.AddDebugFunction(ModInfo.Id, ModInfo.Name, "Appraisal client (test)", () => Log.Guard("鉴定客户（测试）", () =>
             {