fix(second): fix product price

@@ -94,8 +94,8 @@ export default {
       return {};
     },
     selectedPrice() {
-      let price = get(this.product, 'least_price', 0);
-      let secondHandPrice = get(this.product, 'second_hand_least_price', 0);
+      let price = get(this.selectedSize, 'least_price', 0);
+      let secondHandPrice = get(this.selectedSize, 'second_hand_least_price', 0);
 
       if (this.config.type === 'sell') {
         return price;
@@ -120,7 +120,7 @@ export default {
      * 现货价格
      */
     latestPrice() {
-      return this.product.least_price;
+      return this.selectedSize.least_price;
     },
 
     goods_name() {