买 VPS 最怕两件事：买贵了，和买错了到手才发现不能用。这篇用 5 步帮你一次选对。
第 1 步：先想清楚「拿来干嘛」
用途决定一切，别上来就比价格：
- 建站 / 博客（WordPress、个人主页）：1 核 1G 起步够用，看重稳定和线路。
- 跑小应用 / API / 机器人：看 CPU 和内存，关注是否限流。
- 学习 / 练手（Docker、Linux）：便宜大碗优先，挂了重装无所谓。
- 自建服务（私有网盘、监控、Git）：看硬盘和流量。
第 2 步：看懂 4 个核心参数
- CPU / 内存：决定能跑多少东西。建站 1G 够，跑数据库类 2G 起。
- 硬盘：NVMe > SSD > HDD；建站 20–40G 足够。
- 流量：月流量跑满会限速或停机，看清是「单向」还是「双向」计算。
- 线路：面向国内访问的，这条最关键（见我们的线路科普文）。
第 3 步：别只看月付价，算「真实年成本」
很多便宜机是「年付才便宜、月付贵一倍」，还有的续费暴涨。换算成年成本再比。退坑 / 换机时，用 剩余价值计算器 算清楚还能退 / 转多少，别白送。
第 4 步：避开 3 个新手大坑
- 超售严重的小厂：标 1 核实际跑起来卡成 PPT。
- 流量陷阱：200G 流量看着多，跑满秒停机。
- 库存抢不到：热门便宜款经常秒空，盲等不如盯库存。
第 5 步：用实时库存「捡漏」，别原价当冤大头
便宜好款经常缺货，补货就是几分钟的事。直接看我们的 实时库存监控——28 家厂商、1,000+ 款、2 小时探一次，补货一目了然，不用一家家刷。
The two biggest mistakes when buying a VPS: overpaying, and buying the wrong thing and only realizing it after it arrives. These 5 steps help you get it right the first time.
Step 1: Decide What You’re Actually Going to Use It For
Your use case drives everything — don’t jump straight to price comparisons:
- Website / Blog (WordPress, personal homepage): 1 vCPU + 1 GB RAM is enough to start; prioritize stability and routing.
- Small app / API / bot: focus on CPU and RAM, check for rate limiting.
- Learning / tinkering (Docker, Linux): cheap and disposable is fine — reinstall freely.
- Self-hosted services (private cloud storage, monitoring, Git): pay attention to disk size and bandwidth.
Step 2: Understand 4 Core Specs
- CPU / RAM: determines how much you can run. 1 GB is fine for a basic site; databases need 2 GB+.
- Disk: NVMe > SSD > HDD; 20–40 GB is plenty for most sites.
- Bandwidth: hitting the monthly cap usually triggers throttling or suspension — check whether it’s counted one-way or both ways.
- Network route: if you need good access from China, this is the most important factor (see our network routing explainer).
Step 3: Don’t Just Look at the Monthly Price — Calculate the Real Annual Cost
Many cheap plans are only cheap on annual billing; monthly billing can cost twice as much. Some also spike at renewal. Always convert to annual cost before comparing. If you’re switching or canceling mid-cycle, use the remaining value calculator to figure out what you can get back — don’t leave money on the table.
Step 4: Avoid These 3 Beginner Traps
- Heavy overselling from small providers: listed as 1 vCPU, but in practice it crawls like a slideshow.
- Bandwidth traps: 200 GB sounds like a lot until you hit it and your VPS goes offline instantly.
- Can’t grab stock: popular cheap plans sell out fast. Waiting blindly gets you nowhere — watch the stock monitor instead.
Step 5: Use Live Stock Monitoring to Snag Deals — Don’t Pay Full Price
Good cheap plans go out of stock often, but restocks happen within minutes. Check our real-time stock monitor — 28 providers, 1,000+ plans, probed every 2 hours. Restocks are immediately visible so you don’t have to keep refreshing each provider’s site.
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